Air venting device



March 21, 1933. J. N. LA BRANCH 1.902,409

AIR VENTING DEVICE Filed Jan. 12. 193i 2 Sheets-Sheet l A Homey 'March 21, 1933. J. N. LA BRANCH AIR VENTING DEVICE Fned Jan. 12, 1931 2 Sheets-Sheet 2 In vent or Nww Attorney Patented Mar. 21, 1933.- l Y 1,902,409V

nNrrEnsrAI-Es PATENT ori-'ica V JEFFERSON N. LA BRANCH, or SAN DIEGO, CALIFORNIA AIR VENTING niivrcn` Appiiemon sied January 12, l1931. serial No. 503.2189.

rlhis invention relates to a device for autoin thefloat chamber andvis threaded into the maticallyventing air from liquidcontaining upper end of the valve casing 19. tanks.

In carrying the invention into practice,` I bevelled` to provide a valve seat 20. The nueA have'evolved and produced a structural armeral 22 designates a valve'on the lower part rangement of parts of an'interchangeable and of the valve stem 23 which Vextends slidably separable nature and of appropriate config- Y through a concentric guide hole in the fiat uration and design to fulfill the requirements top 15 of the float support 14. On the upper of a vent appliance of this class in a dependend of the valve stem 23 is a suitably shaped able and highly satisfactory manner.` Hoat 24. Thus the fioat support 14 comprises 60' In the drawings; 1n itself a rest for the float, a guide for the Figure 1 is a side elevationalview showing valve stem, anda seat for theV valve. More- A the device in association with a tank. over, it constitutes'means for baffling-.air as Figure 2 is a sectional view through the 1t comes into the float chamber 11. float chamber showing the float mechanism Y `The tank connection pipe 9 is'conne'cted 65 in elevation. n A Y with one side ofthe valve casing 19. vA drain Figure 3 is a horizontal sectional view tak- Cock 25 is threaded into the lower end of the en on the line 3-3 of Figure 2 looking downvalve lcasing fortest purposes. Y y Wardly, he invention 1s especially adaptable Yfor t Figure 4 is an elevational view of the float usewithl water and oil containingtank's. It 70 Support and Valve Seat, v A operates` automatically to control the entry Figure 5 is a vertical sectional view and release of air'rom the tank. as the tank through the float mechanism. is filled with liquid. The rise of fluid inthe igure 6 isa t p plan'view of the fioat float chamber'll causes the fioat 24 to rise support, and p igure 7 is a horizontal sectional view with the valveseat 20 The disk 21 on the taken on the line 7-7 'of Figure 5 looking stem vabovethe valve 22 is small enough to downwardly. A v In the general assembly seen in yFigure 1, gradually cut ofi the flow of air until the the associated tank is denoted by the numervalve 22 reaches its seat whereby regurgita- 8O' al 8. Attached to this by a communicating tions are avoided.v L pipe 9 is thedevice of the inventionwhich As the level of the liquid in the tank and is generally designated by the numeral 10 for float Chamber fans, the H0211? dTODS @OWU fnd 5 automatically venting the tank of air to en'- unseat? the ValVel 85 able filling and extraction of liquid'from the lated m th? Ime 9 and goat Chamber then targl'e device 10 as Shown in Figure 2 com: pheric air to be drawn into the tank through prises a. suitable fioat chamber 11 having an th lat lhamer rom lts Vent 1.2 i air vent or outlet 12 at its top communicated t 1s t Ong t t at" the descmptlon taken and bring thev valve 22 into closing relation 75.4.

with the atmosphere In the interior of the in connection with the drawings will y'enable 90 Chqmber is a Hoat Valve mechanism Gener a clear understanding ofthe invention t'o-'be g ally designated 13 which comprises a hollow, lsaflolgllriease lengthy desclptmn' frustro-conical fioat support 14 having a fiat `Vhe the goat ms'es the Valve Stel-h, the

5 disc-like top 15 and an'air discharge opening disk 21: and thevglve 22, the disk 2lA V.passes y 16 in. one side. The float support acts also as mt@ the nipple .17 and the pressure 'of the an air-bafe. A collar 17 having -a scrW- liquid coming into the globular valve casing threaded nipple 18 depends from the lower pushes against the disk 21. This pushes the part of the lower end of the float support. valve to its seat and also raises the float 24 0 The nipple 18 is passed through an opening sillghtly.

v22 on its seat so The pressure of the liquid in the globular valve casing also operates to hold the valve that as soon as this pressure is released the valve drops down, and the liquid in the float chamber drains out, allowing the float to come to reston the float support where it remains until the tank is filled again. While the preferred embodiment of the invention has been shown and described, it is` to be understood that minor changes coming within the field of invention claimed may be resorted to if desired. Y

I claim:

1. An air venting described, comprising, a closed casing, an air vent leading from the casing, an air an fluid conduit intake opening in the casing, a float valve structure having ay part thereof within the casing and a. part thereof outside the casing, said structure comprising an inverted hollow conical body having an opening in one side and va closed top, a neck depending from the lower end of the body, a reduce screw threaded portion on the llower-end of the neck defining a shoulder on the neck and adapted to be received through said intake opening so as to rest said shoulder upon the part of the casing surrounding said intake opening, a T-shaped fitting having a globular body portion, one 4of the arms thereof being threaded upon the lower end -of thesaid reduced portion so as to engage the exterior of the closed casing adjacent said intake opening, an air and fluid conduitconnected with a lateral arm of the fitting. and a test spigotin the lowermost arm of the fitting; a float adapted to come to rest upon the top of the body, a valve stem depending from the float through a guide hole in the top of the said body and into said globular body portion, a collar near the lower end of the stem adapted to enter snugly said neck, a valve on the lower end of the stem, a valve seat in the lower end of said reduced portion of the neck adapted to seat said valve.

2. An air venting device for -a container, comprising a closed casing having 'a lvent open to the atmosphere, a float valve mecha'- nism in theV casing comprising an inverted hollow frustro-conical float support and baille having an opening in one side thereof, a hollow threaded portion on the lower end of the valve support extending through an opening in the casing, a valve body threaded on the threaded portion outside of the casing, a pipe adapted to be connected to the container to be vented and communicated through one side of the valve body, a valve stem movable through an opening in the top'of the float support, a float on the upper end of the stem device ofthe character toward seatedv position,

raised position, said valve being located below the point of entry of' the pipe when in its fully depressed position, so as to be acted upon by incoming fluid in a manner to delcy the same in depressed position until sufficient fluid has been permitted to pass into the closed casing to buoy-and raise the float, said valve-being adapted to be acted upon by incoming fluid when in a partly raised position so as to be positively moved toward seating with-the valve seat, said stem being so proportioned that the float is raised from the float support to seat the valve.

` 3. An air venting device for a container, comprising a closed casing having a vent open to the atmosphere, a lloatvalve mechanism in the casing comprising an inverted hollow frustro-conical float support and baille having an opening in one side thereof, a hollow threaded portion on the lower end ofthe valve support extending through an opening in the casing, a valve body threaded on the threaded portion outside-of the casing, a pipe eX- tending from the tank and communicated through one side of the valve body, a valve stem movable through an opening in the top of the float support, a float on the upper end of the stem adapted to rest upon the valve support in its fully depressed position, a valveon the lower end of the stem, a vvalve seat in the lower end of the threaded portion of thefloat support with which the valve seats in itsfully raised position, said valve being located below the point of entry of the pipe lwhen in its fully depressed position, so

as to be acted upon by` incoming fluid in a manner to hold the same in depressed position until sufficient fluid'has been permitted to pass into the closed casing to buoy and raise the float, said valve being adapted to be acted upon by incoming fluid when in a partly raised positionso as to be positively moved said stein being so proportioned that the float is raised from the float support to seat the valve, and a disk on the stem above the bore of the threaded portion and in such disposition be acted upon by incoming fluid to aid the valve Vtoward seated position and raise the float from the float support.

In testimony whereof I affix my signature.

JEFFERSON N, LA BRANCH.

adapted to rest upon the valve support in the valve of a size to pass into 

